no arp frame-relay

From: ccie (ccie@gannons.net)
Date: Sun Mar 13 2005 - 16:45:33 GMT-3


I thought that "no arp frame-relay" disabled either arp requests or arp
responses.
I did some testing see below and now I am totally confused ! With it off on
both router on each end of the same PVC it will still request and still
reply.
Any pointers ?

R1#clear fram in
R1#
R1#
R1#
R1#sh fram map

R1#sh run int s 0/0
Building configuration...

Current configuration : 125 bytes
!
interface Serial0/0
 ip address 1.1.1.1 255.255.255.0
 encapsulation frame-relay
 clockrate 64000
 no arp frame-relay
end

R1#
R1#
*Mar 1 00:13:23.827: Serial0/0(i): dlci 102(0x1861), pkt encaps 0x0300
0x8000 0x0000 0x806 (ARP), datagramsize 34
*Mar 1 00:13:23.827: Serial0/0: FR ARP input
*Mar 1 00:13:23.827: datagramstart = 0x38DD3AE, datagramsize = 34
*Mar 1 00:13:23.827: FR encap = 0x18610300
*Mar 1 00:13:23.827: 80 00 00 00 08 06 00 0F 08 00 02 04 00 08 00 00
*Mar 1 00:13:23.831: 01 01 01 02 30 91 00 00 00 00 01 02 00 00
*Mar 1 00:13:23.831:
*Mar 1 00:13:23.831: Serial0/0: frame relay INARP received
*Mar 1 00:13:23.831: FR: Sending INARP Reply on interface Serial0/0
dlci 102 for link 7(IP)
R1#
R1#sh fram map
Serial0/0 (up): ip 1.1.1.2 dlci 102(0x66,0x1860), dynamic,
              broadcast,, status defined, active
R1#

######################################R2################################################
R2#sh run int s 0/0
Building configuration...

Current configuration : 125 bytes
!
interface Serial0/0
 ip address 1.1.1.2 255.255.255.0
 encapsulation frame-relay
 clockrate 64000
 no arp frame-relay
end

R2#
R2#
R2#
R2#clear fram in
R2#
R2#
R2#
R2#sh fram map

R2#ping 1.1.1.255

Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 1.1.1.255, timeout is 2 seconds:

*Mar 1 00:13:08.031: Serial0/0: broadcast search
*Mar 1 00:13:08.031: Serial0/0:encaps failed on broadcast for link 7(IP).
*Mar 1 00:13:10.031: Serial0/0: broadcast search
*Mar 1 00:13:10.031: Serial0/0:encaps failed on broadcast for link 7(IP).
*Mar 1 00:13:12.031: Serial0/0: broadcast search
*Mar 1 00:13:12.031: Serial0/0:encaps failed on broadcast for link 7(IP).
*Mar 1 00:13:14.031: Serial0/0: broadcast search
*Mar 1 00:13:14.031: Serial0/0:encaps failed on broadcast for link 7(IP).
*Mar 1 00:13:16.031: Serial0/0: broadcast search
*Mar 1 00:13:16.031: Serial0/0:encaps failed on broadcast for link 7(IP).
R2#
R2#
R2#
R2#
R2#
*Mar 1 00:13:26.583: Serial0/0(o): dlci 201(0x3091), pkt encaps 0x0300
0x8000 0x0000 0x806 (ARP), datagramsize 34
*Mar 1 00:13:26.583: FR: Sending INARP Request on interface Serial0/0
dlci 201 for link 7(IP)
*Mar 1 00:13:26.603: broadcast dequeue
*Mar 1 00:13:26.603: Serial0/0(o):Pkt sent on dlci 201(0x3091), pkt
encaps 0x300 0x8000 0x0 0x806 (ARP), datagramsize 34
*Mar 1 00:13:26.631: Serial0/0(i): dlci 201(0x3091), pkt encaps 0x0300
0x8000 0x0000 0x806 (ARP), datagramsize 34
*Mar 1 00:13:26.631: Serial0/0: FR ARP input
*Mar 1 00:13:26.631: datagramstart = 0x370070E, datagramsize = 34
*Mar 1 00:13:26.631: FR encap = 0x30910300
*Mar 1 00:13:26.631: 80 00 00 00 08 06 00 0F 08 00 02 04 00 09 00 00
*Mar 1 00:13:26.635: 01 01 01 01 30 91 01 01 01 02 01 02 00 00
*Mar 1 00:13:26.635:
*Mar 1 00:13:26.635: Serial0/0: frame relay INARP received
R2#
R2#sh fram map
Serial0/0 (up): ip 1.1.1.1 dlci 201(0xC9,0x3090), dynamic,
              broadcast,, status defined, active
R2#
R2#

Regards,
Kevin



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